Rubber tire



Patented Jan. 27, 1925.

UNITED STATES EDMUND PISTORIUS, OF ANNABERG, GERMANY.

RUBBER TIR-E.

Application led April 14, 1924.

To all whom if may concern:

Be it known that I, EDMUND Pisfroniris, a citizen oi' the GermanRepublic, residing at Annaberg, Germany, have invented certain. new anduseful Improvements in Rubber Tires, of which the following is aspecification.

A rubber tire without air tube must Jr'ulil the condition that it worksas much as possible in a similar manner as a pneumatic tire. The rubber'tires of known type are either solid tires or consist et two hollowtires but are of insuilicient resiliency.

This invention relates to a tire without air tube which as regardsresiliency is peritect, possesses all the advantages of a pneumatic tirewithout such inconveniences as easy damaging, insecurity of keeping theair and others.

An embodiment of the invention is shown, by way of example, on theaccompanying drawing, in which Fig. l shows part ot a tire inlongitudinal section.

Fig. 2 is a cross section on line 2-2 of F ig. l, and

Fig. 3 is a section on line 3 3 of Fig. 2.

The improved tire consists of a cover and of an inner structure madefrom goed Para rubber.

The cover a .is closed and has a lining` b on its inner surface of itsouter portion and an outer lining c on the outer surface of its innerportion. The linings b, c are made from canvas impregnated with Pararubber. The iianges d of the cover c are very thick so that inconnection with a specially strong rim the tire is securely clamped sothat creeping of the cover on the rim is impossible and also variationof the shape by the load, absolute security in running being thusensured. In the outer surface of the cover a any of the usual non-skiddevices may be arranged.

In the cover i sets of ribs, each set consisting of four ribs, arearranged at uni- :Form distances apart, any desired number of such setsbeing used according to the kind of tire to be produced. The two ribs coi' one set (Figz), are arranged in the vertical cross section line olthe cover and serve as supports .tor a rubber tube en- Serial No.706,478.

larged at the middle to form an air bag g, this bag for-ming anindependent air chamber. The ribs 7i. of the other set are situated inthe line of the horizontal diameter of the cross section and serve asreinforcing beads. The rubber tubes f are connected with one another byshort rubber sleeves each of which forms an independent air chamber. Thevertical rubber tubes serve as elastic stays designed to intercept thepressure exerted on the tiie and the rubber sleeves z' serve for stayingthe vertical tubes. All elements cooperate to produce a perfectresiliency and the eil'ect is absolutely equal to that. of a pneumatictire and defects of the tire are almost excluded.

I claim l. A rubber tire comprising in combination a closed cover and aninner structure consisting of opposite ribs on the inner surface of thecover and of vertical rubber tubes fixed between the two opposite ribsand enlarged at the middle to form a closed independent air chamber.

2. A rubber tire comprising in combina tion a closed cover and an innerstructure consisting of opposite ribs on the inner surface of the cover,of vertical rubber tubes fixed between the two opposite ribs andenlarged at the middle to form a closed independent air chamber, and oflongitudinal rubber sleeves each connecting two vertical rubber tubesand each forming a closed air chamber.

3. A rubber tire comprising in combination a closed cover and an innerstructure consisting of opposite ribs on the inner surface of the cover,of vertical rubber tubes lixed between the two opposite ribs andenlarged at the middle to form a closed independent air chamber, oflongitudinal rubber sleeves each connecting two vertical rubber tubesand each forming a closed air chamber, and reinforcing ribs on the innersurface of the cover arranged between the pair of ribs for thesupporting tubes.

In testimony whereof I aiiix my signature in presence ot two witnesses.

EDMUND PISTORIUS. lVitnesses M. CROEBER, JOHN A. Scorer.

